PYTHON

2d list comprehension python

[[float(c) for c in row] for row in data]

create 2d array python list comprehension

#by taking the user input
def main():
    #write your code here
    row = int(input())
    col  = int(input()
    
    #using the list comprehensions
    matrix = [[int(input())for j in range(col)]for j in range(row)]
    #display the matrix
    for i in range(row):
        for j in range(col):
            print(matrix[i][j],end=" ")
        print()

if __name__ == "__main__":
    main()

2d list comprehension python

[int(x) for line in data for x in line.split()]

how list comprehension for 2D works

dx = [3, 4, 5, 9]
dy = [5, 3, 2, 1]
output_matrix = []
 
for dx_n in dx:
	dx_row = []
	for dy_n in dy:
		dx_row.append(dx_n * dy_n)
	output_matrix.append(dx_row)
 
# Output is [[15, 9, 6, 3], [20, 12, 8, 4], [25, 15, 10, 5], [45, 27, 18, 9]]